    <id>{htmlspecialchars($site_info->id)}</id>
    <title>{htmlspecialchars($site_info->title)}</title>
    <updated>{$site_info->updated}</updated>
    <link rel="self" href="{htmlspecialchars($site_info->self_href)}" />
    <link rel="alternative" href="{$site_info->alternative_href}" />
